Well water in Nemaha County, Kansas
In Nemaha County, none of 32 tested well samples exceeded the EPA limit for lead, based on public data from USGS Water Quality Portal.
32 individual samples from 30 wells, 1971 to 2024. Data refreshed September 3, 2026.
What individual samples found
Each row summarizes every public sample for that contaminant inside Nemaha County. Above limit means above the EPA maximum contaminant level; where EPA has no enforceable limit, the row shows a health guideline or nuisance level instead.
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What this means
The contaminants most often above their limit here are uranium (6% of 16 samples). A well next door can differ sharply from yours because bedrock fractures, well depth and plumbing all matter, so these rates describe the area, not your tap.
Manganese is widespread in local groundwater. It is mainly a staining and taste problem, but high manganese also carries a health advisory for infants.
What to test for in Nemaha County
- Volatile organic compounds (VOCs)64 leaking underground storage tank sites on record locally.
- Uranium6% of 16 local samples were above the limit.
- Coliform bacteriaRecommended for every private well, every year.
- RadonMedian local reading is 210 pCi/L.
- NitrateAbove the limit in 1 of 2 local samples; too few to quote a rate.
- ManganeseDetected in 100% of local samples.
Contamination sources on record in Nemaha County
KDHE records 64 leaking underground storage tank sites in Nemaha County, among 85 regulated sites in total. Groundwater does not follow property lines, so a well within a few hundred feet of one of these is worth testing for what that site could release.
- 64
- leaking underground storage tank sitesGasoline and heating oil that leaked from tanks move through groundwater as benzene, MTBE and other volatile organic compounds.
- 12
- other remediation projects
- 9
- other solid waste facilities
Treatment that fits the local profile
- Uranium
- Point-of-use reverse osmosis; Anion exchange; Whole-house anion exchange
- Manganese
- Oxidizing filter (greensand, birm) whole-house; Water softener (low levels); Point-of-use reverse osmosis
Get your Nemaha County water tested at home
A licensed local water treatment company tests your tap water in your home, walks you through the numbers, and quotes treatment only if something needs fixing. Free, about 30 minutes, no obligation. Tell us what you need and we match you with a company that serves Nemaha County.
Common questions
Is there arsenic in well water in Nemaha County?
Arsenic was detected in 100% of 1 public well samples in Nemaha County, and 0% were above the EPA limit of 10 ug/L. Arsenic has no taste or smell; a lab test is the only way to know your level.
How high is radon in well water in Nemaha County?
The median radon level across 1 public samples in Nemaha County was 210 pCi/L, with a high of 210 pCi/L. New Hampshire recommends treatment above 2,000 pCi/L.
How often should I test a private well in Nemaha County?
Test for bacteria and nitrate every year. Test once for arsenic, uranium, radon, fluoride, manganese and PFAS, then again every three to five years or after any change in taste, color, or plumbing.
Sources
- USGS Water Quality Portal: 58 samples in Nemaha County. Data from the Water Quality Portal, a service of USGS, EPA and USDA; groundwater samples collected by USGS and cooperators. Retrieved September 3, 2026.
- KDHE regulated sites: 85 regulated sites located in Nemaha County. Identified contaminated sites, leaking underground storage tank facilities and solid waste facilities from the Kansas Department of Health and Environment. Retrieved September 9, 2026.
Non-detects count as samples and are treated as zero when computing medians. Exactly at the limit counts as not above it. A sample belongs to the town containing the well's reported coordinates.